Recognition algorithm for the unknown target rejection based on shape statistics obtained from orthogonal distance function

摘要

A method for classification of a target object having a periphery comprises the steps of: selecting a plurality of random first chords D1 across the periphery of the target object;measuring each of the first chords D1 to obtain a plurality of first dimensions;computing for each of the first chords D1 a second chord D2 across the periphery thus forming a plurality of D1, D2 pairs of chords;measuring the second chords D2 for all pairs to obtain second dimensions;computing for each of the pairs of first chords D1 and second chords D2 the ratio D1/D2 of the first dimension to the second dimension to obtain a plurality of first values;computing the logarithm of the first values to obtain a plurality of logarithmic values;computing difference values by subtracting the second dimension from the first dimension for each of the pairs;recording the first values, logarithmic values and difference values in histograms;extracting a vertex lists from the histograms;combining one or more of the vertex lists to obtain a signature indicative of the classification of the object target.;For each of the pairs, the second chords are orthogonal to the first chords, and the second chords share a point with the first chords and the periphery.